Eaton Power Xpert C445 - Table 35. Jam; Table 36. Stall; Table 37. Current Unbalance

Chapter 6—Motor Protection
Power Xpert C445 Global Motor Management Relay MN042003EN—January 2019 www.eaton.com 131
Jam
The C445 will monitor the average RMS value of the three
phase currents. If the RMS value rises above the threshold
for the required length of time a Fault is detected and the
unit will trip. The Jam settings will only be active during the
Motor Running state.
Table 35. Jam
Stall
The Stall protection monitors the average phase current as a
percentage of FLA of the motor and will trip the motor if the
current exceeds the set threshold. The Stall protection is only
active as the motor transitions from the Starting to Running
states.
Table 36. Stall
1
Note
1
Only active during transition from start cycle to run cycle.
Current Unbalance
Current unbalance is defined using the following equation:
The C445 will monitor the Current Unbalance. If the value
exceeds the threshold for the required length of time a fault
is detected and the unit will trip. The Current Unbalance
protection is enabled only in the Motor Running state.
Modifying the TRIP ENABLE/DISABLE register will enable or
disable the Current Unbalance protection feature.
Table 37. Current Unbalance
Fault
Code Modbus
Fault Action Delay (Seconds)
Protection Action Units Min. Max. Default Min. Max. Default Modbus
8 Jam Fault Trip 1008 % FLA 50 400 400 1 60 5 1010
Fault Warning 1009 % FLA 50 400 400 0.2 5 2 1079
Fault
Code Modbus
Fault Action Delay (Seconds)
Protection Action Units Min. Max. Default Min. Max. Default Modbus
20 Stall Fault Trip 1007 % FLA 50 400 200 0 0 0
Fault
Code Modbus
Fault Action Delay (Seconds)
Protection Action Units Min. Max. Default Min. Max. Default Modbus
6 Current Unbalance Fault Trip 1018 % 1 60 15 1 60 15 1020
Fault Warning 1019 % 1 60 15 0.2 5 2 1079